[Qt-interest] Demo Browser and Qt::Concurrent query

[Nitin Mahajan]

Hello,

--- On Wed, 20/1/10, Thiago Macieira <thiago at kde.org> wrote:

> From: Thiago Macieira <thiago at kde.org>
> Subject: Re: [Qt-interest] Demo Browser and Qt::Concurrent query
> To: qt-interest at trolltech.com
> Cc: nitinm76 at yahoo.com
> Date: Wednesday, 20 January, 2010, 12:25 PM
> Em Quarta-feira 20. Janeiro 2010, às
> 06.27.42, Nitin Mahajan escreveu:
> > Am I missing something while using QtConcurrent or
> that is not the right
> > operation to be shifted to a new thread? Can I get
> some pointers towards
> > this?
> 
> You're using it wrong there.
> 
> You're using a QNetworkReply object from a thread that it
> doesn't belong to 
> (that's not allowed) and you're doing GUI operations from a
> thread, which is 
> also not allowed.
> 
> You can open a file and write to it in a thread. But you
> may not do GUI and you 
> may not read from the QNetworkReply in it.
> 
Thanks for the inputs. Suppose I decide to do only the file write(No reading from QNetworkReply or No GUI ops) operation in a separate thread, in this particular case,
Whether spawning of threads very frequently would also result into overhead and inturn GUI drawing in main thread becomes slow?

regards

-Nitin

> -- 
> Thiago Macieira - thiago (AT) macieira.info - thiago (AT)
> kde.org
>   Senior Product Manager - Nokia, Qt Development
> Frameworks
>       PGP/GPG: 0x6EF45358; fingerprint:
>       E067 918B B660 DBD1 105C  966C
> 33F5 F005 6EF4 5358
> 


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